Cultivator blade



Sept. 25, i928.

B. R. BENJAWN cuLTIvAToR BLADE Filed oct. 25, 192e 276mm L' n,

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Patented Sept. 25, i928.

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t v i BERT R. BENJAMIN, or OAK PARK, immers, Assenon To In'rnitiiarronan HAR- vnsrna COMPANY, A conroiaarron or new JiiRsEY. J

CULTATOR BLADE.

Application filed October 25, 1925. Serial No. 143,846.

This invention relates to tillage tools and more particularly to a cultivator blade or sweep for use in cultivation of row crops or as a weeding tool. p

The principal object of the invention is to provide a form of cultivating blade which will be simple and economical and so mounted Y as to be gaged automatically for proper depth of operation in the soil.

Another object is to provide a blade construction which will afford a plurality of sharpened edges any one of which may be presented to the soil, thereby making the blade eective lfor a prolonged period.

|These and other minor objects, which will become apparent as the description proceeds, are attained by a structure comprising a blade formed in twin sections having contacting parts constituting a shank and opposite out wardly extending, angularly related end portions or sweeps, the sections being sharpened at their forward edges and so mounted as to permit either one to be selectively offset or advanced with respect to the other to present its cutting edge to the soil.

Referring to the drawing,

Figure l is a plan view of a blade and portion of a dragbar embodying the invention;

Figure 2 is a similar side elevation;

Figure 3 is a'sectional view on the line 8-3 of Figure 2; and

Figure 4C is an enlarged front view of the twin sections forming the blade, with the sections slightly separated for clearer illustration. Y

n the present embodiment of the invention, each of the-twin blade sections forming the complete tool consists of a flat metal strip having an end portion 5 which is bent or extended at right angles to ,an upper .or main portion 6 on an oblique transverse line as at 7 By so bending or extending the end of the blade, thereis obtained a lateral extension which inclines backwardly and outwardly, in the direction of its length, from the axis of the upper or shank portion 6 when the blade sections are assembled and mounted yin operating position. Each blade section is beveled throughout its length, as at 8, to present a forward cutting edge. Each assembled blade comprises right and leftcomplemental sections which, when clamped together, will afford an upright l shank with oppositely extending wings at its lower end, as clearly shown on the drawing.

` The sections described are assembled and mounted in a novel manner on the end of a dragbar comprising parallel horizontal bars 9 between which the upper ends of the shank port1ons'6 of the blade sections are received and clamped by a suitable'means such as front and 4rear transverse bolts 10. In assembling the blades, one section is set forward of the other, Vas shown at l1 (Figure 8), thereby aording a singlesharp cutting edge throughout the effective length of the shank. l/Vhen this edge has become dulled,.the clamp bolts may be loosened and the opposite blade sece tion similarly advanced, thereby presenting a new sharp edge. This methodof assembly greatly prolongs the eective life of the tool. Extension of the end portions 5 of the blade sections from an obliquer line, as described, affords a blade or sweep particularly designed for mounting in the position illustrated in Figure 2, that is, with'the shank portionl inclined downwardly and rearwardly 'and the end portionsextended outwardly and rearwardly in a horizontal plane, thereby giving a shearing cut throughout the length of the entire blade when drawn throughthe soil. The horizontal position of the dragbar l9 ca uses it to act as a depth gauge, as the bars will ride on the surface ofthe soil and thusy limit the penetration of the blade in accordance with the point of engagement of the .dragbar with lthe blade shank.

The disclosure herein made exemplifies the preferred form of the invention, but certain modiicationsare obviously possible without departing from the scope of the invention as defined in the following claims. l

What is claimed is:

1. An earth working'tool comprising a pair of contacting flat blades, the respective blades having oppositely beveled forward edges ar.- y

ranged in offset relation and end portions which are oppositely extended laterally at right angles, and dragbars clamped on the upper ends of the blades.

blades having'fiat *upwardly` and forwardly extending shank portions arranged in con! tact and opposite, laterally extending enol 10ov I 2. An earth working tool comprising twin tive blades having orward edges which are end portions which are oppositely extended.

oppositely beveled throughout the length laterally, at right angles, and means for holdthereof the forward edge of one blade being ing the contacting` portions of said blades 10 advanced beyond the other. with the edge of one blade advanced with V 5 3. An earth working tool comprising a pair respect to the other.

of contacting flat blades, the respective blades In testimony whereof I nx my signature.

having oppositely beveled forward edges and BERT BENJAMIN. 

